SCHEDULE 14A
FILE NO. 000-22001

SCHEDULE 14A INFORMATION
PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES
EXCHANGE ACT OF 1934

[X] Filed by the Registrant

[ ] Filed by a Party other than the Registrant

Check the appropriate box:

[ ] Preliminary Proxy Statement [ ] Confidential, for Use of the
Commission Only (as permitted by
Rule 14a-6(e)(2))

[X] Definitive Proxy Statement

[ ] Definitive Additional Materials

[ ] Soliciting Material Pursuant to Section 240.14a-12

DELTEK SYSTEMS, INC.
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(Name of Registrant As Specified in its Charter)

Payment of Filing Fee (Check the appropriate box):

[X] No fee required.

[ ] Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and
0-11.

(1) Title of each class of securities to which transaction applies:

N/A
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(2) Aggregate number of securities to which transaction applies:

N/A
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(3) Per unit price or other underlying value of transaction computed
pursuant to Exchange Act Rule 0-11:

N/A
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(4) Proposed maximum aggregate value of transaction:

N/A
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(5) Total fee paid: $

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[ ] Fee paid previously with preliminary materials.

[ ] Check box if any part of the fee is offset as provided by Exchange Act
Rule 0-11(a)(2) and identify the filing for which the offsetting fee
was paid previously. Identify the previous filing by registration
statement number, or the Form or Schedule and date of its filing.

(1) Amount Previously Paid:

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(2) Form, Schedule or Registration Statement No.:

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(3) Filing Party:

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(4) Date Filed:

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[DELTEK SYSTEMS, INC. LETTERHEAD]

[DELTEK LOGO]

April 19, 2001

Dear Deltek Shareholder:

You are cordially invited to attend the 2001 Annual Meeting of Shareholders of
Deltek Systems, Inc. on Friday, May 18, 2001. The meeting will begin promptly at
10:00 a.m. local time, at the McLean Hilton, 7920 Jones Branch Drive, McLean,
Virginia.

The following items are included with this letter: (1) the official notice of
the meeting, (2) the proxy statement, (3) the proxy form, (4) the 2000 Annual
Report on Form 10-K, (5) the 2000 Annual Review, and (6) reservation request
form. The matters listed in the notice of meeting are described in detail in the
proxy statement. The Annual Report includes a financial review of Deltek's
performance in 2000.

If you plan to attend the Annual Meeting, please complete and return to us the
meeting reservation request form.

Your vote is important. Whether or not you plan to attend the Annual Meeting, I
urge you to complete, sign and date the enclosed proxy card and return it in the
accompanying envelope as soon as possible so that your stock may be represented
at the meeting.

Sincerely,

/s/ KENNETH E. DELASKI

Kenneth E. deLaski
President, Chief Executive Officer
and Chairman of the Board of Directors
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DELTEK SYSTEMS, INC.
Principal Executive Offices:
8280 Greensboro Drive
McLean, VA 22102

NOTICE OF ANNUAL MEETING
To be held May 18, 2001

The 2001 Annual Meeting of Shareholders (the "Annual Meeting") of Deltek
Systems, Inc., a Virginia corporation (the "Company" or "Deltek") will be held
at the McLean Hilton, 7920 Jones Branch Drive, McLean, Virginia, on Friday, May
18, 2001 at 10:00 a.m. local time, and thereafter as it may from time to time be
adjourned for the following purposes:

1. To elect two Class I Directors for 3 years or until their successors
have been duly elected and qualified;

2. To ratify the appointment of Arthur Andersen LLP as the Company's
independent auditors for its current fiscal year; and

To transact such other business as may properly come before the Annual
Meeting and any adjournment or postponement thereof.

Holders of record of Deltek Common Stock on April 11, 2001, are entitled to
notice of, and to vote at, the Annual Meeting. A list of shareholders entitled
to vote at the meeting will be available for inspection by shareholders of
record at the executive offices of the Company ten calendar days prior to the
meeting.

WHETHER OR NOT YOU EXPECT TO BE PRESENT AT THE ANNUAL MEETING, PLEASE DATE
AND SIGN THE ENCLOSED FORM OF PROXY AND MAIL IT PROMPTLY IN THE ENCLOSED
ENVELOPE.

By Order of the Board of Directors,

/s/ Babette J. Aller

Babette J. Aller
Secretary

McLean, Virginia
April 19, 2001
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DELTEK SYSTEMS, INC.
Principal Executive Offices:
8280 Greensboro Drive
McLean, VA 22102

PROXY STATEMENT

GENERAL INFORMATION

This proxy statement and the accompanying proxy card and 2000 Annual Report
on Form 10-K are furnished in connection with the solicitation of proxies by the
Board of Directors of Deltek Systems, Inc. ("Deltek" or the "Company") for the
Annual Meeting of Shareholders to be held on Friday, May 18, 2001, at 10:00
a.m., or at any adjournments thereof, at the McLean Hilton, 7920 Jones Branch
Drive, McLean, Virginia (the "Annual Meeting"). These proxy materials are first
being sent to shareholders on or about April 19, 2001. Only shareholders of
record on April 11, 2001 (the "Record Date") are entitled to notice of, and to
vote at, the Annual Meeting.

VOTING OF PROXIES

Your vote is important. Shares can be voted at the Annual Meeting only if
you are present in person or represented by proxy. Even if you plan to attend
the Annual Meeting, you are urged to sign, date and return the accompanying
proxy card.

When the enclosed proxy card is properly signed, dated, and returned, the
stock represented by the proxy will be voted in accordance with your directions.
You can specify your voting instructions by marking the appropriate boxes on the
proxy card. If your proxy card is signed and returned without specific voting
instructions, your shares of Deltek Common Stock will be voted as recommended by
the directors as follows: "FOR" the election of the nominees for director named
on the proxy card (Proposal No. 1), and "FOR" the ratification of the
independent auditors appointed by the Board of Directors (Proposal No. 2).

You may revoke your proxy at any time before it is exercised by (a)
delivering to the Company's secretary at the Company's principal executive
offices either (i) written notice of revocation of the proxy, or (ii) a duly
executed later-dated proxy, or by (b) voting by ballot at the Annual Meeting.

VOTES REQUIRED

The presence, in person or by proxy, of the holders of at least a majority
of the shares of Deltek Common Stock outstanding on the Record Date is necessary
to have a quorum for the Annual Meeting. Abstentions and broker "non-votes" are
counted as present for purposes of determining a quorum. A broker "non-vote"
occurs when a nominee holding shares of Deltek Common Stock for a beneficial
owner does not vote on a particular proposal because the nominee does not have
discretionary voting power with respect to that item and has not received
instructions from the beneficial owner. Less than a quorum may adjourn a
meeting.

As of the Record Date, 15,202,749 shares of Deltek Common Stock were
outstanding. Each shareholder is entitled to 1 vote on each item at the Annual
Meeting, in person or by proxy, for each share of Common Stock held of record by
such shareholder on the Record Date. Election of the nominees for the Board of
Directors (Proposal No. 1) will require the plurality of the votes cast by
shares entitled to vote in the election. Should either of the nominees become
unavailable to accept nomination or election as a director, the individuals
named as proxies on your proxy card will vote the shares represented by your
proxy card for the election of such other person as the Board may recommend. The
Board of Directors knows of no reason why the nominees will be unavailable or
unable to serve. Ratification of the appointment of independent auditors
(Proposal No. 2) will be approved if the votes cast favoring ratification exceed
the votes cast in opposition. Proxies solicited by the Board of Directors will
be voted "FOR" each item, unless otherwise instructed on your proxy card. Shares
not voted by abstention and broker non-votes will not be counted either for or
against an item, and such abstentions and broker non-votes will not affect the
outcome of the vote on such item.
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SOLICITATION OF PROXIES

Solicitation of proxies may be made by use of the mails and may also be
made in person or by telephone or other electronic communications. The cost of
soliciting proxies in the accompanying form will be borne by the Company. The
Company may reimburse brokerage firms and others for their expenses in
forwarding proxy materials to the beneficial owners and soliciting them to
execute the proxies.

ANNUAL MEETING ATTENDANCE

Admission to the Annual Meeting is limited to shareholders of record or
their proxy, beneficial owners of Deltek Common Stock having evidence of
ownership, and guests of Deltek. If you are a registered owner of Deltek Common
Stock and plan to attend the Annual Meeting in person, please complete and
return to Deltek's Corporate Secretary the meeting reservation request form
printed on the back of this proxy statement. Shareholders who have not obtained
a reservation for the Annual Meeting will be admitted upon verification of
ownership at the Annual Meeting. Results of the Annual Meeting will be included
in Deltek's next quarterly report filed with the Securities and Exchange
Commission.

PROCEDURE FOR SHAREHOLDER PROPOSALS AND NOMINATIONS

The Board of Directors currently performs the functions of a nominating
committee and will consider director nominees recommended by shareholders for
election at an annual meeting, in accordance with the procedures set forth in
the Company's Bylaws. Under the Bylaws, written notice of a shareholder's intent
to make such a nomination generally must be received at the Company's principal
executive offices not less than 120 calendar days in advance of the date that
the Company's proxy statement was released to the shareholders in connection
with the previous year's annual meeting of shareholders. The notice must contain
the information required by the Company's Bylaws.

The Bylaws also provide that no business shall be conducted at any meeting
of shareholders unless specified in the notice of the meeting (or any supplement
thereto) by or at the direction of the Board of Directors, otherwise brought
before the meeting by or at the direction of the Board of Directors, or properly
brought before the meeting by a shareholder of the Company who complies with
certain notice procedures set forth in the Bylaws. These requirements are
separate and apart from, and in addition to, the Securities and Exchange
Commission's requirements for the inclusion of a shareholder's proposal in the
Company's proxy statement.

Proposals of shareholders intended to be presented at the 2002 Annual
Meeting must be received by the Company's Corporate Secretary at the Company's
principal executive offices no later than December 1, 2001, for inclusion in the
Company's proxy statement and form of proxy relating to that meeting. Such
proposals must also meet the requirements set forth in the rules and regulations
of the Securities and Exchange Commission in order to be eligible for inclusion
in the Company's 2002 proxy materials.

The Company's Bylaws are incorporated herein by this reference. A copy of
the Bylaws may be obtained by following the instructions set forth on the last
page of this proxy statement.

DISSENTERS' RIGHTS OF APPRAISAL

The Board of Directors has not proposed any action for which the laws of
the State of Virginia, the Certificate of Incorporation or Bylaws of the Company
provide a right of a shareholder to dissent and obtain payment for shares.

OTHER MATTERS TO COME BEFORE THE ANNUAL MEETING

The Board of Directors does not know of any matters which will be brought
before the Annual Meeting other than those specifically set forth in the notice
of meeting and this proxy statement. If any other matters are properly
introduced at the Annual Meeting for consideration, including, among other
things, consideration of a motion to adjourn the meeting to another time or
place, the individuals named on the proxy card will vote in accordance with
their best judgment.
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PROPOSAL 1
TO ELECT TWO CLASS I DIRECTORS
EACH TO SERVE FOR THREE YEARS OR UNTIL HIS
SUCCESSOR HAS BEEN DULY ELECTED AND QUALIFIED

The Company's Board of Directors currently consists of 6 persons. The
Company's Articles of Incorporation and Bylaws provide that, commencing with the
1997 Annual Meeting of Shareholders, the Board of Directors shall be divided
into 3 classes with each class containing 1/3 of the total number of directors,
as nearly equal in number as possible. Our directors, the class to which they
were elected or appointed, and the expiration dates of their positions are as
follows:

NAME CLASS TEAM EXPIRING
---- --------- -------------

James F. Petersen................... Class I 2001 Annual Meeting
Charles W. Stein.................... Class I 2001 Annual Meeting
Donald deLaski...................... Class II 2002 Annual Meeting
Darrell J. Oyer..................... Class II 2002 Annual Meeting
Kenneth E. deLaski.................. Class III 2003 Annual Meeting
Robert E. Gregg..................... Class III 2003 Annual Meeting

The Board of Directors has concluded that the re-election of James F.
Petersen and Charles W. Stein as Class I directors is in the best interest of
the Company and recommends approval of their election. Biographical information
concerning Messrs. Petersen and Stein can be found under "Executive Officers and
Directors." The remaining directors will continue to serve in their positions
for the remainder of their terms.

EXECUTIVE OFFICERS AND DIRECTORS

The Company's executive officers and directors are as follows:

NAME AGE POSITION
---- --- --------

Kenneth E. deLaski.................... 43 President, Chief Executive Officer,
and Chairman of the Board of Directors
Donald deLaski........................ 69 Director
Lori L. Becker........................ 40 Chief Financial Officer and Treasurer
Robert E. Gregg....................... 53 Director
Darrell J. Oyer....................... 60 Director
James F. Petersen..................... 57 Director and Class I Director Nominee
Charles W. Stein...................... 60 Director and Class I Director Nominee

Kenneth E. deLaski was a co-founder of the Company in November 1983 and has
served as a director of the Company since its inception and as Chairman of the
Board of Directors since June 2000. Mr. deLaski also has served as the Company's
President since May 1990 and as its Chief Executive Officer since February 1996.
From May 1990 to February 1996, he served as the Company's Chief Operating
Officer. Mr. deLaski is a certified public accountant. He is the son of Donald
deLaski, a director of the Company.

Donald deLaski was a co-founder of the Company in November 1983 and served
as Chairman of the Board of Directors from the Company's inception until June
2000. Mr. deLaski continues to serve as a director of the Company. He also
served as the Company's Chief Executive Officer from its inception until
February 1996, and as its Treasurer until July 1999. Mr. deLaski is a certified
public accountant. He is the father of Kenneth E. deLaski, President, Chief
Executive Officer, and Chairman of the Board of Directors of the Company.

Lori L. Becker was appointed to her position of Chief Financial Officer and
Treasurer on January 30, 2001. Ms. Becker is a certified public accountant. She
has been with the Company since 1991 serving in various operational roles. Prior
to coming to Deltek, Ms. Becker was a controller for a government contractor and
a senior auditor for Ernst and Young, a "big five" accounting firm.

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Robert E. Gregg has served as a director of the Company since September
1986. Mr. Gregg has been a partner in Reed Smith Hazel & Thomas LLP, counsel to
the Company, since the merger in November 1999 of Reed Smith Shaw & McClay, LLP
and Hazel & Thomas, PC, where he has been a shareholder since Hazel & Thomas'
inception in 1987.

Darrell J. Oyer became a director of the Company in February 1997. Since
June 1991, Mr. Oyer has served as President of Darrell J. Oyer and Company, a
consulting company. Mr. Oyer was previously a partner with Deloitte and Touche
and was previously the Assistant Director of several functional areas of the
Defense Contract Audit Agency.

James F. Petersen became a director of the Company in September 2000. Mr.
Petersen is general manager of Carmel Associates, Inc. which he founded in 1997
and which provides financing and guidance to startup internet application
service providers in the Washington, D.C. area. Prior to that, he founded Best
Software, Inc. in 1982 and served as the company's CEO and Chairman until it was
purchased by The Sage Group in 2000. Before founding Best Software, Mr. Petersen
held several senior management positions at Aspen Systems Corporation. Mr.
Petersen has been nominated for election as a Class I Director.

Charles W. Stein became a director of the Company in April 1997. Since
April 1997, Mr. Stein has served as president of Stein Venture Management, a
consulting firm. From February 1987 until January 1997, Mr. Stein served as
President and Chief Executive Officer of Netrix Corporation, a wide area network
product and systems company. Mr. Stein was also a director of Netrix Corporation
from February 1987 and its Chairman from January 1997 until he resigned March
31, 1997. Mr. Stein has been nominated for re-election as a Class I Director.

Deltek's executive officers are appointed annually by, and serve at the
discretion of, the Board of Directors. Each executive officer is a full-time
employee of the Company. Other than the relationship between Donald deLaski and
Kenneth E. deLaski described herein, there are no family relationships between
any director or executive officer of the Company.

THE BOARD OF DIRECTORS

The Board of Directors is responsible for overseeing the overall
performance of the Company. Members of the Board of Directors are kept informed
of the Company's business through discussions with the President and other
members of the Company's management and staff, by reviewing materials provided
to them and by participating in Board of Directors and committee meetings.
During 2000, the Board of Directors met 8 times.

COMMITTEES OF THE BOARD OF DIRECTORS

The Board of Directors has audit and compensation committees, but not a
nominating committee.

The Audit Committee is responsible for reviewing with management the
financial controls, accounting, credit and reporting activities of the Company.
The Audit Committee reviews the qualifications of the Company's independent
auditors, makes recommendations to the Board of Directors regarding the
selection of independent auditors, reviews the scope, fees and results of any
audit, and reviews non-audit services and related fees provided by the
independent auditors. The members of the Audit Committee are Darrell J. Oyer,
James F. Petersen, and Charles W. Stein, all of whom meet the independence
requirements. The Audit Committee held 4 meetings during the last fiscal year.
Mr. Petersen was appointed to the Audit Committee in September 2000 and did not
participate in any of these meetings.

The Compensation Committee is responsible for the administration of all
salary and incentive compensation plans for the officers and key employees of
the Company, including bonuses. The Compensation Committee may also administer
the Company's 1996 Stock Option Plan and 1996 Employee Stock Purchase Plan. The
members of the Compensation Committee are Darrell J. Oyer, James F. Petersen,
and Charles W. Stein, all of whom are independent directors. The Compensation
Committee met 1 time during the last fiscal year. Mr. Petersen was appointed to
the Compensation Committee in September 2000 and did not participate in the
meeting which was held prior to his appointment.

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COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

The Company has no interlocking relationships or other transactions
involving any of its Compensation Committee members that are required to be
reported by the Securities and Exchange Commission rules, and no current or
former officer of the Company serves on its Compensation Committee.

DIRECTOR COMPENSATION

Directors who are not employees of the Company receive $1,000 for each
meeting of the Board of Directors or any committee thereof attended in person
and $500 for each such meeting attended telephonically, except that if a
committee meeting is held on the same day as a meeting of the full Board of
Directors, the compensation for attendance at such committee meeting is $300. In
addition, each of the outside directors receives a quarterly stipend of $1,000,
and the Chairman of the Audit Committee receives an additional stipend of $2,000
per quarter. The Company reimburses outside directors for any travel expenses
incurred in connection with attending Board of Directors or committee meetings.
Each of the outside directors, except for Donald deLaski, has been granted
nonqualified options under the Company's 1996 Stock Option Plan to purchase
shares of the Company's Common Stock at prices ranging from $7.656 to $11.00 per
share. Messrs. Gregg, Oyer, and Stein have each been granted options to purchase
12,000 shares. Mr. Petersen has been granted options to purchase 4,000 shares.
Directors who are employees of the Company will receive no additional cash
compensation for their services as members of the Board of Directors or
committees thereof other than reimbursement for travel expenses incurred in
connection with attending Board of Directors and committee meetings.

EXECUTIVE COMPENSATION

Summary Compensation Information

The following table sets forth information concerning the compensation
earned during the years ended December 31, 1998, 1999 and 2000 by the Company's
Chief Executive Officer and "Executive Officers", as defined in the Securities
Exchange Act of 1934, whose compensation exceeded $100,000 (collectively, the
"Named Executive Officers"):

LONG-TERM COMPENSATION
--------------------------------------
ANNUAL COMPENSATION AWARDS PAYOUTS
---------------------------------------------- ------------------------- ----------
SECURITIES
OTHER RESTRICTED UNDERLYING
NAME AND ANNUAL STOCK OPTIONS/ LTIP
PRINCIPAL POSITION YEAR SALARY($) BONUS($) COMPENSATION($) AWARDS($)(1) SARs(#) PAYOUTS(#)
------------------ ---- ---------- -------- --------------- ------------ ---------- ----------

Kenneth E. deLaski,.... 2000 206,667 -- -- -- -- --
President, Chief 1999 185,000 -- -- -- -- --
Executive Officer, 1998 179,042 -- -- -- -- --
and Chairman of the
Board of Directors
David L. Spilman....... 2000 120,421 13,000 -- -- -- --
Chief Financial 1999 -- -- -- -- -- --
Officer, VP of 1998 -- -- -- -- -- --
Finance and
Administration, and
Treasurer(4)

NAME AND ALL OTHER
PRINCIPAL POSITION COMPENSATION($)(2)
------------------ ------------------

Kenneth E. deLaski,.... 4,000
President, Chief 4,000
Executive Officer, 4,000
and Chairman of the
Board of Directors
David L. Spilman....... 3,000
Chief Financial --
Officer, VP of --
Finance and
Administration, and
Treasurer(4)

- ---------------
(1) The Named Executive Officer did not hold restricted stock awards as of the
end of the fiscal year. The number and value of the aggregate restricted
stock holdings for Mr. deLaski at the end of the last fiscal year, based on
the closing bid price of the Company's Common Stock on the Nasdaq National
Market on December 31, 2000, was 4,615,600 shares with a value of
$19,616,300, without giving effect to the consideration paid by him.

(2) Includes for 1998, 1999 and 2000 a 401(k) plan profit sharing contribution
of $4,000 for Mr. deLaski and for Mr. Spilman a 401(k) plan profit sharing
contribution of $3,000 for 2000. Does not include other perquisites and
personal benefits the aggregate amount of which did not exceed 10% of the
total annual salary and bonus reported for the Named Executive Officer.

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(3) Represents the dollar value of non-cash compensation from the exercise of
options to convert to Common Stock during the fiscal year.

(4) Mr. Spilman resigned as an officer of and terminated his employment by the
Company on December 15, 2000.

Option Grants in Last Fiscal Year

The following table sets forth information concerning grants of options to
purchase the Company's Common Stock made during the year ended December 31, 2000
to the Named Executive Officers.

INDIVIDUAL GRANTS
---------------------------------------------------- POTENTIAL REALIZABLE
VALUE AT ASSUMED
ANNUAL RATES OF
NUMBER OF % OF TOTAL STOCK PRICE
SHARES OPTIONS APPRECIATION FOR
UNDERLYING GRANTED TO EXERCISE OPTION TERM(2)
OPTIONS EMPLOYEES IN PRICE PER EXPIRATION ----------------------
NAME GRANTED FISCAL YEAR(1) SHARE DATE 5% 10%
---- ---------- -------------- --------- ---------- -------- --------

Kenneth E. deLaski........................... -- -- -- -- -- --
David L. Spilman............................. 25,000 3.12% $19.00 3/6/10 (3) (3)
25,000 3.12% $13.50 9/18/10 (3) (3)
6,985 0.87% $ 7.25 9/18/10 (3) (3)

- ---------------
(1) The Company granted options to purchase an aggregate of 800,860 shares of
the Company's Common Stock to employees during the year ended December 31,
2000.

(2) The potential realizable value is based on the term of the option at the
time of grant (ten years). Potential gains are net of the exercise price but
before taxes associated with the exercise. Amounts represent hypothetical
gains that could be achieved for the respective options if exercised at the
end of the option term. The assumed 5% and 10% rates of stock price
appreciation are provided in accordance with the rules of the Securities and
Exchange Commission and do not represent the Company's estimate or
projection of the future common stock price. Actual gains, if any, on stock
option exercises are dependant on the future financial performance of the
Company, overall market conditions and the option holders' continued
employment through the vesting period. This table does not take into account
any appreciation in the price of the common stock from the date of grant to
the date hereof.

(3) Mr. Spilman resigned from the Company on December 15, 2000. All options were
unvested and cancelled as of that date.

Option Exercises and 2000 Fiscal Year-End Option Values

The following table sets forth information concerning the exercise of stock
options during the year ended December 31, 2000 and the value of options held as
of such date by the Named Executive Officers:

NUMBER OF SECURITIES VALUE OF UNEXERCISED
NUMBER OF UNDERLYING UNEXERCISED IN-THE-MONEY OPTIONS AT
SHARES OPTIONS AT DECEMBER 31, 2000 DECEMBER 31, 2000(2)
ACQUIRED VALUE ----------------------------- ---------------------------
NAME UPON EXERCISE RECEIVED(1) EXERCISABLE UNEXERCISABLE EXERCISABLE UNEXERCISABLE
---- ------------- ----------- ------------ -------------- ----------- -------------

Kenneth E. deLaski.... -- -- -- -- -- --
Donald L. Spilman..... -- -- -- (3) -- (3)

- ---------------
(1) "Value Received" represents the fair market value of the underlying common
stock on the exercise date minus the aggregate exercise price of such
options.

(2) Based upon the closing bid price on Nasdaq of the Company's common stock as
of December 31, 2000 of $4.25 per share, minus the aggregate exercise price
of such options.

(3) Mr. Spilman resigned from the Company on December 15, 2000. All options were
unvested and cancelled as of that date.

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1996 Stock Option Plan

Deltek's 1996 Stock Option Plan (the "1996 Option Plan") was adopted by the
Company's Board of Directors in November 1996 and approved by the Company's
shareholders in December 1996. A total of 2,100,000 shares of Common Stock have
been reserved for issuance under the 1996 Option Plan. The 1996 Option Plan is
administered by the Board of Directors or a committee thereof. The 1996 Option
Plan provides for grants of "incentive stock options," within the meaning of
Section 422 of the Code, to employees (including officers and employee
directors), and for grants of nonstatutory options to employees, non-employee
directors and consultants. The 1996 Option Plan will terminate in December 2006,
unless terminated sooner by the Board of Directors.

The exercise price of stock options granted under the 1996 Option Plan must
be not less than the fair market value of the Common Stock on the date of grant.
With respect to any optionee who owns stock representing more than 10% of the
voting power of all classes of the Company's outstanding capital stock, the
exercise price of any incentive stock option must be equal to at least 110% of
the fair market value of the common stock on the date of grant, and the term of
the option must not exceed 5 years. The terms of all other options may not
exceed 10 years. The aggregate fair market value of Common Stock (determined as
of the date of the option grant) for which an incentive stock option may for the
first time become exercisable in any calendar year may not exceed $100,000. The
Board of Directors or any committee administering the 1996 Option Plan has
discretion to determine exercise schedules and vesting requirements, if any, of
all option grants under the 1996 Option Plan.

As of December 31, 2000, options to purchase an aggregate of 1,468,788
shares were outstanding under the 1996 Option Plan, at exercise prices ranging
from $4.25 per share to $18.687 per share and 378,398 options were exercisable
as of December 31, 2000. In 2000, 56,985 options were granted to 1 executive
officer under the Plan. All of such options were cancelled upon the resignation
of the officer. Options totaling 743,875 shares were granted under the Plan in
2000 to all employees (excluding executive officers) as a group. Options granted
through December 31, 2000 generally vest and become exercisable in 5 annual
installments beginning 1 year after the date of the option grant. In January
2001 the Board of Directors authorized quarterly vesting for options granted on
and after January 1, 2001, options for employees employed for at least 1 year to
vest quarterly over 4 years from the date of grant, and options for new
employees to vest 25% at the end of the first year and then quarterly over the
remaining 3 years.

Employee Time Accelerated Stock Option Plan

Deltek's Time Accelerated Stock Option Plan (the "Accelerated Plan") was
adopted by the Company's Board of Directors and approved by its shareholders in
April 1996. A total of 1,500,000 shares of Common Stock originally were reserved
for issuance under the Accelerated Plan. In December 1996, the Company's Board
of Directors reduced the number of shares of Common Stock reserved for issuance
under the Accelerated Plan to 679,500, the number of shares of Common Stock
issuable upon the exercise of options then outstanding. The Accelerated Plan
provides for grants of nonstatutory options to key employees of the Company. The
Accelerated Plan was discontinued at the time of the adoption of the 1996 Option
Plan, and no additional options will be granted under the Accelerated Plan.
Options previously granted under the Accelerated Plan will continue to be
governed by the terms of the Accelerated Plan, which will be administered by the
Board of Directors.

The exercise price of options granted under the Accelerated Plan must be
not less than the fair market value of the Common Stock on the date of grant.
The term of options granted under the Accelerated Plan is 10 years, subject to
certain exceptions. All of the options granted under the Accelerated Plan become
exercisable on January 1, 2004. Any options that are fully vested at the time an
optionee's employment with the Company terminates for any reason (other than
death, disability or retirement) terminate 3 months after the date of
termination unless earlier exercised.

As of December 31, 2000, options to purchase 261,650 shares of Common
Stock, at a weighted average exercise price of $4.00 per share, were outstanding
under the Accelerated Plan and 180,950 of such options were exercisable.

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1987 Employee Stock Option Plan

Deltek's 1987 Employee Stock Option Plan (the "1987 Option Plan") was
adopted by the Company's Board of Directors and approved by its shareholders in
December 1987. A total of 900,000 shares of Common Stock originally were
reserved for issuance under the 1987 Option Plan. In December 1996, the
Company's Board of Directors reduced the number of shares of Common Stock
reserved for issuance under the 1987 Option Plan to 388,500, the number of
shares of Common Stock issuable upon the exercise of options outstanding as of
September 30, 1996. The 1987 Option Plan provided for grants of nonstatutory
options to key employees of the Company. The 1987 Option Plan was discontinued
at the time of the adoption of the 1996 Option Plan, and no additional options
will be granted under the 1987 Option Plan. Options previously granted under the
1987 Option Plan will continue to be governed by the terms of the 1987 Option
Plan, which will be administered by the Board of Directors.

The exercise price of options granted under the 1987 Option Plan is based
on the book value of the Common Stock at the end of the fiscal year immediately
prior to the year in which the option is granted, as reflected in the Company's
audited financial statements, reduced by any dividend declared by the Company
with respect to the previous fiscal year. The term of options granted under the
1987 Option Plan is 10 years, subject to certain exceptions. Generally, options
granted under the 1987 Option Plan become exercisable pursuant to a 5-year
vesting schedule provided the optionee remains employed full time by the Company
and are subject to a right of repurchase by the Company upon the termination of
the optionee's employment.

As of December 31, 2000, options to purchase 61,255 shares of Common Stock
were outstanding and exercisable under the 1987 Option Plan at exercise prices
ranging from $.304 to $.517 per share.

1996 Employee Stock Purchase Plan

Deltek's 1996 Employee Stock Purchase Plan (the "Purchase Plan") was
adopted by the Company's Board of Directors in November 1996 and approved by its
shareholders in December 1996. A total of 400,000 shares of Common Stock are
reserved for issuance under the Purchase Plan. The Purchase Plan, which is
intended to qualify under Section 423 of the Code, is administered by the Board
or a committee thereof. Employees (including officers and employee directors of
the Company) are eligible to participate in the Purchase Plan if they are
customarily employed for more than 20 hours per week 5 months per year. The
Purchase Plan permits eligible employees to purchase Common Stock through
payroll deductions, which may not exceed 10% of an employee's compensation. The
price at which stock may be purchased under the Purchase Plan is equal to 85% of
the lower of the fair market value of the common stock on the first day of the
offering period or the last day of the offering period. Employees may end their
participation in the offering at any time during the offering period, and
participation ends automatically on termination of a participant's employment
with the Company. In addition, participants may not purchase shares of Common
Stock having a value (measured at the beginning of the offering period) greater
than $25,000 in any calendar year.

As of December 31, 2000, 191,434 shares of Common Stock have been issued
under the Purchase Plan.

8
12

Performance Graph

COMPARISON OF CUMULATIVE TOTAL RETURN* AMONG
DELTEK SYSTEMS, S&P 500, PEER GROUP AND S&P SMALLCAP 600
LINE GRAPH

DELTEK SYSTEMS S&P 500 PEER GROUP S&P SMALLCAP 600
-------------- ------- ---------- ----------------

2/97 100.00 100.00 100.00 100.00
12/97 143.75 125.52 95.47 123.53
12/98 153.41 161.39 72.73 121.92
12/99 122.73 195.35 132.28 137.04
12/00 38.64 177.57 89.95 153.21

Assumes initial investment of $100

* Total Return assumes reinvestment of dividends
Note: Total Returns based on market capitalization

The above graph assumes a $100 investment on February 20, 1997 and
reinvestment of all dividends, in the Company's Common Stock, the S&P 600 Index,
and a composite peer group consisting of the following companies: Aspen
Technology, Inc., J.D. Edwards & Co., HNC Software Inc., Infinium Software,
Inc., JDA Software Group, Inc., Lightbridge, Inc., Manugistics Group, Inc.,
Pegasus Systems, Inc., Project Software & Development, Inc., Remedy Corp., and
Frontstep, Inc.

SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

Section 16(a) of the Securities Exchange Act of 1934, as amended (the
"Exchange Act"), requires the Company's officers and directors, and persons who
own more than 10 percent of a registered class of the Company's equity
securities, to file reports of ownership and changes in ownership of equity
securities of the Company with the Securities and Exchange Commission and Nasdaq
National Market. Officers, directors and greater than 10 percent stockholders
are required by Securities and Exchange Commission regulation to furnish the
Company with copies of all Section 16(a) forms that they file.

Based solely upon a review of Forms 3 and 4 furnished to the Company during
its most recent fiscal year and Forms 5 furnished to the Company with respect to
its most recent fiscal year, as well as written representations of each
reporting person, all reporting persons satisfied the reporting requirements,
except that one Form 3, reporting no holdings, was inadvertently filed late by
James F. Petersen.

9
13

CERTAIN TRANSACTIONS

Robert E. Gregg, a director of the Company, is a partner in Reed Smith
Hazel & Thomas LLP, a law firm that the Company has retained. The legal fees
paid to Reed Smith Hazel & Thomas by the Company did not exceed 5% of Reed Smith
Hazel & Thomas' gross revenues during the firm's last full fiscal year.

The Company has entered into indemnification agreements with certain of its
executive officers and directors setting forth certain procedures and other
conditions applicable for claims for indemnification pursuant to the Company's
articles of incorporation and agreeing, subject to certain limitations, to
obtain and maintain directors' and officers' liability insurance coverage for
its directors and officers.

COMPENSATION COMMITTEE REPORT ON EXECUTIVE COMPENSATION

During its fiscal year ended December 31, 2000, the Company's decisions on
executive officer compensation were made in an effort to attract and retain
highly qualified personnel and to recognize individual performance through the
use of incentives, including equity-based incentives, that reward the creation
of shareholder value and the achievement of key Company objectives.

EXECUTIVE COMPENSATION POLICY

The executive compensation policy of the Compensation Committee is to offer
compensation to its executive officers in such forms and at such levels that
will attract, retain, and motivate the management talent that is necessary for
the Company's continued success, and to create incentives for executive officers
to continuously improve the Company's financial performance, customer
satisfaction, and shareholder value.

To implement this policy, the Compensation Committee believes that the
compensation of the Company's executive officers and senior management should be
competitive in relation to similar software companies and closely related to
both personal and Company performance. The Compensation Committee also believes
that compensation should include components, such as stock options, designed to
align the interests of executive officers and shareholders.

As part of its executive compensation policy, the Compensation Committee
reviews executive compensation, including that of its Chief Executive Officer,
in light of its relationship to corporate performance. The Compensation
Committee considers measures of corporate performance including software sales,
earnings per share, and the trading price of the Company's Common Stock.

ROLE OF THE COMPENSATION COMMITTEE

Consistent with past practices, Kenneth E. deLaski, the Company's President
and Chief Executive Officer, and Donald deLaski, then Chairman, reviewed the
performance of the Company's senior management and recommended to the
Compensation Committee specific adjustment to their compensation. The
Compensation Committee considered the salary changes as recommended by the
President and Chairman, taking into account the Company's interest in
attracting, retaining, and motivating the management and technological talent
that is crucial to the Company's success, as well as the performance of the
Company and the personal performance of each of the foregoing officers and key
employees. The Compensation Committee also considered the fact that the Company
had historically used stock options to supplement salaries and would continue to
use options to compensate and motivate managers. The Committee found that the
proposed salary adjustments were reasonable and appropriate, including
increasing the base salary for Kenneth deLaski, President and Chief Executive
Officer to $225,000 per annum, and maintained the base salary for Donald
deLaski, Chairman, at $60,000 per annum. The Compensation Committee therefore
recommended that the Board of Directors ratify, confirm and approve the
foregoing salary adjustments.

The Compensation Committee:

Charles W. Stein, Committee Chairman
Darrell J. Oyer, Committee Member

10
14

PROPOSAL 2
TO RATIFY APPOINTMENT OF ARTHUR ANDERSEN LLP
AS THE COMPANY'S INDEPENDENT AUDITORS
FOR ITS CURRENT FISCAL YEAR

Subject to ratification by the shareholders, the Board has reappointed
Arthur Andersen LLP as independent auditors to audit the consolidated financial
statements of the Company for its fiscal year ending 2001. The Board of
Directors recommends a vote in favor of ratification of the reappointment of
Arthur Andersen LLP.

Arthur Andersen LLP has served as the Company's independent accountants to
audit the financial statements of the Company for over 10 years. Representatives
from Arthur Andersen LLP are expected to be present at the Annual Meeting, and
they will have the opportunity to make a statement if they desire to do so and
are expected to be available to respond to appropriate questions.

The ratification of independent auditors is not a matter required to be
submitted to a vote of the shareholders; however, the Company believes that
shareholder ratification may provide the auditors with a greater degree of
independence from management. In the event of a negative vote by the
shareholders, the Board would reconsider the reappointment of Arthur Andersen
LLP.

AUDIT FEES. Arthur Andersen LLP billed the Company $165,000 during fiscal
year 2000 for the audit of the Company's annual financial statements and review
of the financial statements contained in the Company's quarterly reports on Form
10-Q.

FINANCIAL INFORMATION SYSTEM DESIGN, AND IMPLEMENTATION FEES. Arthur
Andersen LLP did not perform any financial information system design or
implementation services for the Company during fiscal year 2000.

ALL OTHER FEES. Arthur Andersen LLP billed the Company $155,600 during
fiscal year 2000 for other services, including services related to due
diligence, an acquisition audit, and tax planning.

AUDIT COMMITTEE REPORT

We have reviewed and discussed with management the Company's audited
financial statements as of and for the year ended December 31, 2000.

We have discussed with the independent auditors the matters required to be
discussed by Statement of Auditing Standards No. 61, Communication with Audit
Committees, as amended, by the Auditing Standards Board of the American
Institute of Certified Public Accountants.

We have received and reviewed the written disclosures and the letter from
the independent auditors required by Independence Standard No. 1, Independence
Discussions with Audit Committees, as amended, by the Independence Standards
Board, and have discussed with the auditors the auditors' independence.

Based on the reviews and discussions referred to above, we recommend to the
Board of Directors that the financial statements referred to above be included
in the Company's Annual Report on Form 10-K for the year ended December 31,
2000.

The Audit Committee:

Darrell J. Oyer, CPA, Committee
Chairman
James F. Petersen, Committee Member
Charles W. Stein, Committee Member

On May 23, 2000, the Board of Directors approved a written charter to
govern the Audit Committee. A copy of the Company's Audit Committee Charter is
included as Appendix A to this proxy statement.

11
15

VOTING SECURITIES AND PRINCIPAL HOLDERS THEREOF

The following table contains information regarding the beneficial ownership
of the Company's Common Stock as of the Record Date by (i) each person known by
the Company to own beneficially 5% or more of the Common Stock, (ii) each of the
Company's Named Executive Officers, (iii) directors and director nominees, and
(iv) executive officers and directors as a group:

NAME OF AMOUNT AND NATURE OF
TITLE OF CLASS BENEFICIAL OWNER BENEFICIAL OWNERSHIP(1) PERCENT OF CLASS
- -------------- ---------------- ----------------------- ----------------

Common Stock Kenneth E. deLaski 4,633,200(2) 30.48
Common Stock Donald deLaski 3,026,200(3) 19.91
Common Stock Robert E. Gregg 8,000(4) *
Common Stock Darrell J. Oyer 11,319(4)(5) *
Common Stock James F. Petersen --(6) *
Common Stock Charles W. Stein 11,350(4) *
Common Stock William Blair & Company L.L.C. 1,128,350(7) 7.42
Common Stock Brown Brothers Harriman 735,300(8) 4.84
Common Stock All directors, director nominees 7,690,069 50.58
and executive officers as a group
(6 persons)

- ---------------
* Represents less than one percent.

(1) Unless otherwise indicated and subject to community property laws where
applicable, the persons named in this table have sole voting and sole
investment power with respect to the shares shown as beneficially owned by
them. Beneficial ownership is determined in accordance with Rule 13d-3 under
the Exchange Act.

(2) Includes 63,500 shares held by various trusts for which Kenneth E. deLaski
and his spouse serve as the trustees and 930,650 shares held of record or
beneficially by Kenneth E. deLaski's spouse, Tena R. deLaski. Excludes
178,000 shares held by a foundation established by Kenneth E. deLaski for
which Kenneth E. deLaski and his spouse serve as the directors and officers.
Mr. deLaski disclaims beneficial ownership of such shares.

(3) Excludes 445,900 shares held by a foundation established by Donald deLaski
for which Donald deLaski and his spouse serve as the directors and officers.
Mr. deLaski disclaims beneficial ownership of such shares.

(4) Includes 8,000 shares issuable upon exercise of vested options and excludes
4,000 shares issuable upon exercise of unvested options.

(5) Includes 319 shares owned by Mr. Oyer's spouse. Mr. Oyer's shares are held
in a pension trust for which he serves as trustee.

(6) Excludes 4,000 shares issuable upon exercise of unvested options.

(7) As reported on a Schedule 13G filed by William Blair & Company, L.L.C. on
February 14, 2001. According to such Schedule 13G, William Blair & Company,
L.L.C. has sole voting power with respect to 218,000 of these shares, and
sole dispositive power with respect to all 1,128,350 of these shares. The
address of this stockholder is 222 West Adams Street, Chicago, IL 60606.

(8) As reported on Schedule 13G filed by Brown Brothers Harriman on January 18,
2001. According to such Schedule 13G, Brown Brothers Harriman has sole
voting power with respect to none of these shares, and sole dispositive
power with respect to none of these shares. The address of this stockholder
is 59 Wall Street, New York, NY 10005.

THE COMPANY'S BYLAWS ARE INCORPORATED INTO THIS PROXY STATEMENT BY REFERENCE.
THE COMPANY WILL SEND, WITHOUT CHARGE, TO EACH PERSON TO WHOM THIS PROXY
STATEMENT IS DELIVERED, UPON WRITTEN OR ORAL REQUEST OF SUCH PERSON, A COPY OF
THE COMPANY'S BYLAWS WITHIN ONE BUSINESS DAY OF THE RECEIPT OF SUCH REQUEST, BY
FIRST CLASS MAIL OR EQUALLY PROMPT MEANS. ANY SUCH REQUEST SHOULD BE DIRECTED TO
THE COMPANY'S INVESTOR RELATIONS DEPARTMENT AT THE COMPANY'S PRINCIPAL EXECUTIVE
OFFICE, 8280 GREENSBORO DRIVE, MCLEAN, VA 22102, (703) 734-8606.

PUBLICATIONS OF INTEREST TO DELTEK SHAREHOLDERS ARE AVAILABLE FREE OF CHARGE.
THESE INCLUDE ANNUAL AND QUARTERLY REPORTS TO SHAREHOLDERS, AS WELL AS OTHER
REPORTS, OTHER THAN EXHIBITS FILED THEREWITH, FILED WITH THE SECURITIES AND
EXCHANGE COMMISSION. THIS MATERIAL MAY BE OBTAINED BY WRITTEN REQUEST TO THE
COMPANY'S INVESTOR RELATIONS DEPARTMENT SENT TO THE COMPANY'S PRINCIPAL
EXECUTIVE OFFICE.

12
16

Appendix A

AUDIT COMMITTEE CHARTER

The Audit Committee shall have the following authority, powers and
responsibilities:

AUDIT COMMITTEE RESPONSIBILITIES:

1. The Audit Committee shall have the power to conduct or authorize
investigations into matters within the Audit Committee's scope of
responsibilities. The Audit Committee shall be empowered to retain
independent counsel, accountants or others to assist it in the conduct of any
investigation.

2. The Audit Committee shall meet at least four (4) times per year or more
frequently as circumstances require. The Audit Committee may ask members of
management, the internal auditor or others to attend the meeting and provide
pertinent information as necessary.

3. The Audit Committee will perform such other functions as assigned by law, the
Corporation's articles of incorporation or bylaws, or the Board of Directors.

AUDIT COMMITTEE OPERATIONS:

1. Review and update the Audit Committee's charter annually and submit any
recommended changes to the Board of Directors for approval.

2. Report Audit Committee actions to the Board of Directors with such
recommendations as the Audit Committee may deem appropriate.

3. Annually prepare a self-assessment of its activities for the year and discuss
the results with the independent auditor.

4. Review filings with the Securities and Exchange Commission and other
published documents containing the Corporation's financial statements and
consider whether the information contained in these documents is consistent
with the information contained in the financial statements.

5. Review policies and procedures with respect to officers' expense accounts and
perquisites including their use of corporate assets and consider the results
of any review of these areas by the independent auditor.

6. Review legal and regulatory matters that may have a material impact on the
financial statement, related company compliance policies, and programs and
reports received from regulators.

7. Beginning for the year 2001, prepare the report required by the rules of the
Securities and Exchange Commission to be included in the Corporation's annual
proxy statement.

INTERNAL AUDITOR:

1. Review the appointment and replacement of the senior internal auditing
executive.

2. Review the workplan of the internal auditor and monitor the work during the
year and meet with the internal auditor at least quarterly.

3. Review the reports to management prepared by the internal auditor and review
the management response.

4. Prepare input to management on the personal evaluation of the internal
auditor.

INDEPENDENT AUDITOR:

1. Provide an open avenue of communication between the independent auditor and
the Board of Directors.

2. Review periodic reports from the independent auditor regarding the auditor's
independence, discuss such reports with the auditor, and if so determined by
the Audit Committee, recommend that the Board take appropriate action to
insure the independence of the auditor.

A-1
17

3. Recommend to the Board of Directors the independent auditor to be nominated,
approve the compensation of the independent auditor, review and approve the
fees charged by the independent auditor and approve the discharge of the
independent auditor.

4. Preview management consulting services and related fees provided by the
independent auditor.

5. Consider, in consultation with the independent auditor, the audit scope and
plan of the independent auditor.

6. Consider and review with the independent auditor:

a. The adequacy of the Corporation's internal controls including
computerized information systems controls and security.

b. Any related significant findings and recommendations of the independent
auditor together with management's responses thereto.

7. Evaluate the performance of the independent auditor annually and, if so
determined by the Audit Committee, recommend that the Board replace the
independent auditor. Criteria for this evaluation shall be established and
documented.

MANAGEMENT AND THE INDEPENDENT AUDITOR:

1. Inquire of management, the internal auditor and the independent auditor about
signs of risks or exposures and assess the steps management has taken to
minimize such risks to the Corporation.

2. Consider with management and the independent auditor the rationale for
employing audit firms other than the principal independent auditor.

3. Review with management, the internal auditor and the independent auditor at
the completion of the annual examination:

a. The Corporation's annual financial statements and related footnotes.

b. The independent auditor's audit of the financial statements and their
report thereon.

c. Any significant changes required in the independent auditor's audit
plan.

d. Any serious difficulties or disputes with management encountered during
the course of the audit.

e. Other matters related to the conduct of the audit which are to be
communicated to the Audit Committee under generally accepted auditing
standards, including assurance that Section 10A of the Private
Securities Litigation Reform Act of 1995 has not been implicated.

f. Any major issues regarding accounting and auditing principles and
practices, including accounting principles and practices as suggested by
the independent auditor, internal auditor or management.

g. Analysis of significant financial reporting issues and judgments made in
the preparations of the financial statements.

h. Adequacy of the internal audit function as related to reporting,
responsibilities, budget and staffing.

4. Review with the independent auditor, management and the internal auditor the
results of any review of the Corporation's monitoring compliance with the
Corporation's code of conduct, including aspects related to
subsidiary/foreign affiliated entities. Advise the Board with respect to the
Corporation's policies and procedures regarding compliance with applicable
laws and regulations and the Corporation's Code of Conduct.

5. Meet with the independent auditors, internal auditor and management in
separate, executive sessions to discuss any matters that the Audit Committee
or these groups believe should be discussed privately with the Audit
Committee.

A-2
18

6. Review with management and the independent auditor the Corporation's
quarterly financial statements prior to the release of quarterly earnings.

MANAGEMENT:

1. Meet periodically with management to review the Corporation's major financial
risk exposures and the steps management has taken to monitor and control such
exposures.

A-3
19

DELTEK SYSTEMS, INC.
2001 ANNUAL SHAREHOLDERS MEETING
RESERVATION REQUEST FORM

Detach Here
- -------------------------------------------------------------------------------

Complete the following information and return it to Corporate Secretary, Deltek
Systems, Inc., 8280 Greensboro Drive, McLean, VA 22102, for admission to the
2001 Annual Meeting of Shareholders of Deltek Systems, Inc.

Shareholder's Name and Address:
-------------------------------------------

--------------------------------------------------------------------------

--------------------------------------------------------------------------
Number of Shares of Deltek
Common Stock held:
--------------------------------------------------------

If the shares listed above are not registered in your name, identify the
name of the shareholder of record below and bring with you to the Annual Meeting
evidence that you beneficially own the shares.

Shareholder of Record:
-- -------------------------------------------------

THIS IS NOT A PROXY CARD

1632-PS-01
20

PROXY
DELTEK SYSTEMS, INC.

ANNUAL MEETING OF SHAREHOLDERS OF
DELTEK SYSTEMS, INC.
ON MAY 18, 2001

THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS

The undersigned hereby appoints Kenneth E. deLaski, Donald deLaski and Darrell
J. Oyer, and each of them, proxies, with power of substitution, to vote all
shares of the undersigned at the Annual Meeting of Shareholders of Deltek
Systems, Inc., a Virginia corporation (the "Company"), to be held on May 18,
2001 at 10:00 a.m. at the McLean Hilton, 7920 Jones Branch Drive, McLean,
Virginia, or at any adjournment thereof, upon the matters set forth in the Proxy
Statement for such meeting, and in their discretion, upon such other business as
may properly come before the Annual Meeting.

CONTINUED AND TO BE SIGNED ON REVERSE SIDE
SEE REVERSE SIDE SEE REVERSE SIDE

THE SHARES REPRESENTED BY ALL PROXIES RECEIVED WILL BE VOTED IN ACCORDANCE WITH
THE CHOICES SPECIFIED ON SUCH PROXIES. THE SHARES REPRESENTED BY A PROXY WILL BE
VOTED IN FAVOR OF A PROPOSAL IF NO CONTRARY SPECIFICATION IS MADE. ALL VALID
PROXIES OBTAINED WILL BE VOTED AT THE DISCRETION OF THE BOARD OF DIRECTORS WITH
RESPECT TO ANY OTHER BUSINESS THAT MAY COME BEFORE THE ANNUAL MEETING.

1. TO ELECT TWO CLASS I DIRECTORS TO SERVE FOR THREE YEARS OR UNTIL THEIR
SUCCESSORS HAVE BEEN DULY ELECTED AND SHALL QUALIFY.

Nominees: James F. Petersen and Charles W. Stein

[ ] FOR [ ] WITHHELD

------------------------------
For all nominees except as noted above

2. TO RATIFY THE APPOINTMENT OF ARTHUR ANDERSEN LLP AS THE COMPANY'S
INDEPENDENT AUDITORS FOR ITS CURRENT FISCAL YEAR.

[ ] FOR [ ] AGAINST [ ] ABSTAIN

Mark here for address change and note at left

NOTE: When shares are held by joint tenants, both
should sign. Persons signing as Executor,
Administrator, Trustee, etc. should so indicate.
Please sign exactly as the name appears on the proxy.

PLEASE MARK, SIGN AND RETURN THIS PROXY CARD
PROMPTLY USING THE ENCLOSED ENVELOPE.

Signature:_______________ Date: ______ Signature:_________________ Date: ______